Steel jacketed copper boiler



ug- 4, 1931- A. H. TRAGEsER ET AL 1,817,8 57

Patented Aug. 4, 1931 UNITED STATES PATENT OFFICE ALBEBT H. TRAGESER AND LOUIS HASSINGEB, OF NEW YORK, N. Y.

STEEL JAGKETED COPPEB BOILEB Application iled'ctoher 20, 1928. Serial' No. 313,770.

This invention relates to reinforced copper boilers, and particularly to an improved steel jacket for cover-ing and reinforcing a copper boiler, the object being to provide' a` completely and correctly formed copper'boiler` vide a copper boiler with a covering of-as-- bestos or other heat insulating` means and' then relntoreing the boiler by a complete jacket of steel welded or otherwise rigidly 20 seeured together and in position over the boiler.

In the-aeeompanying drawings,- Figure 1 is a side view of a copper' boiler with certain parts broken away;

Figure 2 is a side view of the boiler shown in Figure 1, but with the jacket embodying the invention applied thereto, certain parts being shown .in section for illustrating the arrangement of the boiler, jacket and heat insulating members;

Figure 3 is a perspective view showing the two end jacket members disclosed in F igure 2; w g

Figure 4 is a perspective view of-theicentral acket member shown in Figurey.

Referring to the accompanying drawings by numerals, 1 indieates a copper boiler, and 2 indicates broadly-a steel jacket adapted to completely enclose the boiler 1, evcept the outlet members. Between the steel jacket 2 and boiler 1 is-a lining 3 of ashcstos or other heat insulating material.

In the use of large copper boilers for supplying hot water or for other purposes. a fl large aniount of copper is necessary in order to make the boilcrs suiiiciently-strong to withstand the' pressure created by heating the water. To overcome the disadvantage of using a large supply of copper for a given size of boiler, the steel jacket 2 is used to enc-lose a boiler of copper made of eomparatively thin copper.v llrVhere there is no jacket the boiler 1 must be made very thick, but where there is a steel jacket this boiler may be made vei .thin and be properly supported by the j ac (et 2. As clearly shown in Figure l, the boiler 1 is formed in the usual manner of cop-I per boilers with the end members 12 having their depending flanges 12' telescoping interiorly of the body 4, so that they may be welded in place in the usual manner of welded boilers; The various outlets may be also Secured in place in any usual preferred manner. On top of the boiler 1 is applied part of the lining or covering 3 of asbestos or other heat resisting material and then the end jacket members 5 and 6 are placed in position. The se jacket members are of. steel and are made of an exact size and shape to snugly fit over the lining 3. S uitable openings are provided for accommodating certain' of the outlets. Arranged centrally of the boiler is a jacket hand 7 of steel. This hand is shown open in Figure 4 and in this conditionvis mounted in place. After being moimted in place the band is squeezed tightly against the lining 3 and againstportions of the end members 5 and 6 whichare overlapped thereby. The parts are' so proportioned that when the jacket hand 7- is properly squeezed into place, V as shown in Figure 2, the edges S and 9' may i be welded together: This hand is also welded along the top and bottom lines 10 and 11 Fto the end members 5 and 6, Whereby the steel jacket is substantiall-y one-piece. It Will thus be seen that a complete working boiler is provided, as shown in Figure 1, and on top of this is applied a complete and practically. one-piece steel'jacket with' a heat insulating lining 3 arranged exteriorly of. the boiler and interiorlvvof the jacket. By providing the steel jacket, a very thin sheet of copper may be used in forming the boiler 1, but by forming the boiler and jacket inflependently an eXtra-eiicient Structure is produced in the capacity of the boiler to be .water and steam tightand to resist high pressure through the action of the jacket.

fhat I claim is v 1. A steel jacketed copper boiler, comprising a copper boiler and a steel jacket therefor, said steel jacket being formed of a plurality of ieces welded together and the oiler being ormed of a plurality of copper pieces welded together, the line of Welding of the copper boiler being out of alignment with the line of Welding of the steel jacket, the walls of said steel jacket being uninterrupted whereby the jacket will provide an even support over the entire surface of said copper boiler including the ends thereof.

2. A steel reinforced copper boiler comprising a' boiler formed of copper having'an outlet and a steel reinforcing jacket for said boiler, said jacket consisting of a cup shaped member at each end of the boiler and a central tubular member at the center of the boiler, said members fitting over and completely enclosing the copper boiler, said tubular member overlapping the cup shaped members, all of said members being continuous and uninterrupted whercby an even support is provided over the entirc surface of said boiler including the ends thereof.

3. A steel reinforced copper boiler comprising a boiler formed of copper and provided With a number of outlets, a steel reinforcing jacket for said boiler formed of a pair of cup shaped members and a tubular member, said tubular member being arranged ccntrally of the copper boiler and overlapping the end members, said jacket completely enclosing said copper boiler, a hcat-insulating lining arranged between said boiler and said jacket, said lining covering said boiler including the end and acting to resist radiation of heat from thev boiler, and also as a means for transmitting pressure from the boiler to the jacket.

4. A steel reinforced copper boiler comprising a boiler body formed of copper provided with a number of outlets, a built-up steel reinforcing jacket surrounding said body and a'cting in effect as a continuous onepiece tubular structure covering the entire copper boiler including the ends, and a heatinsulating filling positioned between said body and said jackct for resisting the passage of heat from said body and for transmitting strain from said body to said jacket.

LoUIs HASSINGER. ALBERT H. TRAGESER. 

